[circuithero]

Approximately 15 hours according to iBasso.

 

[Andrew_WOT]

Quote:

Originally Posted by Asr /img/forum/go_quote.gif Pico: - DAC: Wolfson WM8740 - ASRC: Analog Devices AD1896 (de-clocked to 96 kHz) - USB-I2S conversion: PCM2707 (er, unadvertised) - op-amp: Analog Devices AD8397 (built-in buffer) (not as cheap as NE5532) - battery type: 8.4V Li-Ion w/ smart charging, 20 hours - voltage swing: 8V - maximum output current: 250 mA - maximum output power: 500 mW - two-board assembly - built & assembled in USA

Asr, thanks a lot for that info. You are wonderful, but you already know that.

 

[powertoold]

Anyone have this problem:

Sometimes, when the D2 is charging, the red LED in the back blinks, and every time it blinks, there is an audible "click" noise with my FreQs.

 

[souperman]

Quote:

Originally Posted by powertoold /img/forum/go_quote.gif Anyone have this problem: Sometimes, when the D2 is charging, the red LED in the back blinks, and every time it blinks, there is an audible "click" noise with my FreQs.

Hm, I don't have that happen to mine. Weird. I guess the best way to use it is to use it straight from battery. It's the cleanest power source anyways.

 

[powertoold]

Quote:

Originally Posted by souperman /img/forum/go_quote.gif Hm, I don't have that happen to mine. Weird. I guess the best way to use it is to use it straight from battery. It's the cleanest power source anyways.

I don't think it's audible with headphones. I think the battery charging goes in stages: solid red, blinking red, then green.

 

[souperman]

Quote:

Originally Posted by powertoold /img/forum/go_quote.gif I don't think it's audible with headphones. I think the battery charging goes in stages: solid red, blinking red, then green.

Ah, I see. I used my X3i's with it no problem though.

 

[powertoold]

Quote:

Originally Posted by souperman /img/forum/go_quote.gif Ah, I see. I used my X3i's with it no problem though.

Does your charging red light blink (it has a subtle blink, so you have to look directly at it)?

Also, I tried feeding 24bit 96khz FLACs through the USB, and it works fine. Did someone say it isn't supposed to work?

 

[Andrew_WOT]

Quote:

Originally Posted by powertoold /img/forum/go_quote.gif Does your charging red light blink (it has a subtle blink, so you have to look directly at it)? Also, I tried feeding 24bit 96khz FLACs through the USB, and it works fine. Did someone say it isn't supposed to work?

Everything over 16/48 is just gets discarded, you might be loosing some SQ this way. Launch asiocaps or asio4all it'll show max cap of the device.

 

[TSi]

I have ran the Viper at 11'00 position for about a day using battery only, it lasts 15 hours. So basically iBasso isnt wrong about it.

 

[souperman]

Quote:

Originally Posted by TSi /img/forum/go_quote.gif I have ran the Viper at 11'00 position for about a day using battery only, it lasts 15 hours. So basically iBasso isnt wrong about it.

Sounds like enough for me. With opamp rolling though, it may be less or more depending on the opamps you roll in.

 

[powertoold]

I put in AD8599 (IC2) and ADA4841 (IC7 - main opamp). They are pretty low power opamps, so I hope I'll get longer battery. I feel like I need the battery to last as long as possible since they don't warranty the battery, heh.

 

[souperman]

Quote:

Originally Posted by powertoold /img/forum/go_quote.gif I put in AD8599 (IC2) and ADA4841 (IC7 - main opamp). They are pretty low power opamps, so I hope I'll get longer battery. I feel like I need the battery to last as long as possible since they don't warranty the battery, heh.

How do you like it with your new combo? Got any more opamps to try?

 

[powertoold]

I haven't really experimented, but I do like the stock opamps. I tried the LT1469 for about 5 minutes but felt it was muddier than the 1364.

I don't think I've lost much from the stock to ADA4841 switch (I don't feel like it's any worse), but I'm not listening analytically. I think it's a good idea to use a low noise opamp with IEMs. With the 4841, I can barely hear any hiss with my sensitive FreQs. Also, the low and high gain seem to have the same amount of hiss when I made the switch. Now, I am always using high gain because it sounds better for some reason (like more authoritative?).

My Opamp supply is as follows:

LT1057
LT1364
LT1469
LT6241
LT6234
LMH6643
AD8397
AD8599
AD8656
AD4841
LM4562
OPA2111KP

 

[TSi]

Quote:

Originally Posted by souperman /img/forum/go_quote.gif Sounds like enough for me. With opamp rolling though, it may be less or more depending on the opamps you roll in.

well, i dont see anyone "avg" running more than 15 hours =D

let say u wake up at 730, go to work by 830, u have... till 1130 night time to listen to music on the viper. if its less / more from rolling the opamp, i dont think it'll affect it TOO much.

 

[souperman]

Quote:

Originally Posted by powertoold /img/forum/go_quote.gif I haven't really experimented, but I do like the stock opamps. I tried the LT1469 for about 5 minutes but felt it was muddier than the 1364. I don't think I've lost much from the stock to ADA4841 switch (I don't feel like it's any worse), but I'm not listening analytically. I think it's a good idea to use a low noise opamp with IEMs. With the 4841, I can barely hear any hiss with my sensitive FreQs. Also, the low and high gain seem to have the same amount of hiss when I made the switch. Now, I am always using high gain because it sounds better for some reason (like more authoritative?). My Opamp supply is as follows: LT1057 LT1364 LT1469 LT6241 LT6234 LMH6643 AD8397 AD8599 AD8656 AD4841 LM4562 OPA2111KP

I definitely agree with that statement.